1016605 has 4 divisors (see below), whose sum is σ = 1219932. Its totient is φ = 813280.

The previous prime is 1016599. The next prime is 1016611. The reversal of 1016605 is 5066101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5066101 = 2221 ⋅2281.

It is an interprime number because it is at equal distance from previous prime (1016599) and next prime (1016611).

It can be written as a sum of positive squares in 2 ways, for example, as 573049 + 443556 = 757^2 + 666^2 .

It is not a de Polignac number, because 1016605 - 2³ = 1016597 is a prime.

It is a Duffinian number.

1016605 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101656 + ... + 101665.

It is an arithmetic number, because the mean of its divisors is an integer number (304983).

2^1016605 is an apocalyptic number.

It is an amenable number.

1016605 is a deficient number, since it is larger than the sum of its proper divisors (203327).

1016605 is an equidigital number, since it uses as much as digits as its factorization.

1016605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203326.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 1016605 is about 1008.2683174632. The cubic root of 1016605 is about 100.5504643303.

The spelling of 1016605 in words is "one million, sixteen thousand, six hundred five".